math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

pure mathematics - the branches of mathematics that study and develop the principles of mathematics for their own sake rather than for their immediate usefulness

spherical trigonometry - the trigonometry of spherical triangles

triangulation - a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart; useful in navigation